卫星速率自适应系统中流量控制机制的设计  

Design and Implementation of A Flow Control Mechanism of Rate Adaptive System in Satellite

作　　者：杨磊[1] 龚险峰[1] 

机构地区：[1]中国空间技术研究院西安分院,陕西西安710100

出　　处：《电子科技》2016年第2期116-118,121,共4页Electronic Science and Technology

摘　　要：针对大气层因降雨会导致无线信号衰减,而随着频率的升高,降雨对信号的衰减会显著增加的问题。提出了一种适用于卫星速率自适应系统的流量控制方法。该方法对令牌漏桶算法进行改进,通过多分组累计比较的方式,保证每个业务流对带宽使用的确定性。实验结果表明,应用该方法的速率自适应系统对超额占用带宽的业务进行有效地限制。本方法已在FPGA上实现,具有复杂度低和资源占用少的优点。A flow control method for rate-adaptive-system in satellite is proposed for the significant increase in signal attenuation in rainy weather with the frequency. Based on the improved token bucket algorithm, this method can guarantee the proper bandwidth of services, by accumulation and comparison of multiple packets. It is shown that the rate-adaptive-system using the method can limit the service occupying excess bandwidth. This method has been implemented in FPGA for its low-complexity and small resource consumption.

关 键 词：流量控制 令牌漏桶 FPGA 

分 类 号：TN927.2[电子电信—通信与信息系统]